Language support across GitHub products (#18677)

* Update content

* Create github-language-support.md

* Add reminder HTML comments

* Add link to supported languages article

* Add intro for GitHub's products

* Add note to list of CodeQL supported languages

* table with package managers

* Update table and add conceptual info

* Versioning to fix broken links

* Fix table layout

* Add package managers to table

* Fix versioning syntax

* Incorporate reviewer feedback

* Center table headers

* Update Dependabot features in table

* Add footnote for third-party code scanning support

* Update link

* support native markdown table alignments

* Update links for ghes2.22

* Use proper names of package managers

* Add Scala

* Adjust conceptual info

* Flip table axes

* Delete unused reusables

* Update link to Packages info

* fix merge conflict

* fix other merge conflict

* Update codeql-languages-bullets.md

* Revert "Update codeql-languages-bullets.md"

This reverts commit 69547205f5e43a8fbf3edc51c89f0f647eef285a.

* Update article topic to sentence case

Co-authored-by: Sarah Schneider <sarahs@github.com>

content/github/getting-started-with-github/githubs-products.md

@@ -16,6 +16,8 @@ topics:
   - Security
 ---
 
+### About {% data variables.product.prodname_dotcom %}'s products
+
 {% data variables.product.prodname_dotcom %} offers free and paid products. You can see pricing and a full list of features for each product at <{% data variables.product.pricing_url %}>. {% data reusables.products.product-roadmap %}
 
 ### {% data variables.product.prodname_free_user %} for user accounts